n.a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
同义词：ytterbite
英汉双解大词典
gadolinite/ˈɡædəlɪˌnaɪt/
1.
N（名词）
a rare brown or black mineral consisting of a silicate of iron, beryllium, and yttrium in monoclinic crystalline form. Formula: 2BeO.FeO.Y2O3.2SiO2 硅铍钇矿 (Also called ytterbite)